X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=libringbuffer%2Fbackend_types.h;h=83fe04871dd26f0885b8859065b8d14cf277a552;hb=3ff7660f2ce6362de87a48bc45c9a98b9c785472;hp=81e67119847a119b2ad140e71aefa0a648ef5bfa;hpb=3c8964ba54f920c4a33b1e371c4c07ddcdc40383;p=lttng-ust.git

diff --git a/libringbuffer/backend_types.h b/libringbuffer/backend_types.h
index 81e67119..83fe0487 100644
--- a/libringbuffer/backend_types.h
+++ b/libringbuffer/backend_types.h
@@ -1,14 +1,26 @@
-#ifndef _LINUX_RING_BUFFER_BACKEND_TYPES_H
-#define _LINUX_RING_BUFFER_BACKEND_TYPES_H
+#ifndef _LTTNG_RING_BUFFER_BACKEND_TYPES_H
+#define _LTTNG_RING_BUFFER_BACKEND_TYPES_H
 
 /*
  * linux/ringbuffer/backend_types.h
  *
- * Copyright (C) 2008-2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
  * Ring buffer backend (types).
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * Copyright (C) 2008-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; only
+ * version 2.1 of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include <limits.h>
@@ -30,6 +42,16 @@ struct lttng_ust_lib_ring_buffer_backend_subbuffer {
 	unsigned long id;		/* backend subbuffer identifier */
 };
 
+struct lttng_ust_lib_ring_buffer_backend_counts {
+	/*
+	 * Counter specific to the sub-buffer location within the ring buffer.
+	 * The actual sequence number of the packet within the entire ring
+	 * buffer can be derived from the formula nr_subbuffers * seq_cnt +
+	 * subbuf_idx.
+	 */
+	uint64_t seq_cnt;               /* packet sequence number */
+};
+
 /*
  * Forward declaration of frontend-specific channel and ring_buffer.
  */
@@ -46,6 +68,8 @@ struct lttng_ust_lib_ring_buffer_backend {
 	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_subbuffer, buf_wsb);
 	/* ring_buffer_backend_subbuffer for reader */
 	struct lttng_ust_lib_ring_buffer_backend_subbuffer buf_rsb;
+	/* Array of lib_ring_buffer_backend_counts for the packet counter */
+	DECLARE_SHMP(struct lttng_ust_lib_ring_buffer_backend_counts, buf_cnt);
 	/*
 	 * Pointer array of backend pages, for whole buffer.
 	 * Indexed by ring_buffer_backend_subbuffer identifier (id) index.
@@ -84,4 +108,4 @@ struct channel_backend {
 	struct lttng_ust_lib_ring_buffer_shmp buf[];
 };
 
-#endif /* _LINUX_RING_BUFFER_BACKEND_TYPES_H */
+#endif /* _LTTNG_RING_BUFFER_BACKEND_TYPES_H */